/Engine/Source/Runtime/Experimental/Chaos/Public/PhysicsProxy/PerSolverFieldSystem.h
WhenFilterType_ is set toActive_ the complete particle mapping is provided from theParticles.X_ toParticles.Attribute_.
static void GetFilteredParticleHandles ( [TArray](API\Runtime\Core\Containers\TArray)< [Chaos::FGeometryParticleHandle](API\Runtime\Chaos\Chaos\FGeometryParticleHandle) * > & ParticleHandles, const [Chaos::FPBDRigidsSolver](API\Runtime\Chaos\FPBDRigidsSolver) * RigidSolver, const EFieldFilterType FilterType, const EFieldObjectType ObjectType )